交错点
参考答案：
分流点、合流点、冲突点的统称。
What are your neighbors like?
A．They are workers.
B．They are tall.
C．They are quiet.
D．They are old men.
因特殊原因油码头需建在上游时，与各建（构）筑物之间的距离应大于（）。
A.5km
B.4km
C.3km
D.2km
